what's the pattern?
1,4,9,1,6,2,5,3,6,4,9,6,4
This is the square numbers.
1 ^ 2 = 1
2 ^ 2 = 4
3 ^ 2 = 9
4 ^ 2 = 16
5 ^ 2 = 25
6 ^ 2 = 36
7 ^ 2 = 49
8 ^ 2 = 64
Now put hyphens between EVERY digit:
1-4-9-1-6-2-5-3-6-4-9-6-4